?Heavy Duty Durable Carabiner Clips?: Our carabiner clips are made of zinc-galvanized steel, protect against corrosion, waterproof and rustproof which gives it have a long service life. ?4 Inch Spring Snap Hook Carabiner?: The M10 Safety Snap hook carabiner is 4 x 2 inch . Hold capacity:7700 lbs; Large heavy-duty carabiner clip with 4-inch full length for chain, wire, rope, and slings, perfect carabiner accessory for outdoor activities. ?Safety and Quickly Chain Links?: Quick links open and closes smoothly like a spring with an interlocking tooth, high safety, and stability, making it easy to attach important items to it. ?Packaging?: Package includes 20pcs M10 strong Spring Snap Hooks, allowing the fastest connection/disconnection usages, widely used for swing hammock gym outdoor. ?Widely Applications?: Ideal for a hammock, swing set, gym, fitness, hiking, camping, or indoor-outdoor equipment.